Quarterly report pursuant to Section 13 or 15(d)

Shareholders' Deficit - Summary of Changes in Shareholders' Deficit (Detail)

v3.19.1
Shareholders' Deficit - Summary of Changes in Shareholders' Deficit (Detail) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Beginning balance $ (723.4) $ (334.7)
Issuance of 0.4 and 2.7 common shares from exercise of stock options, SARs, restricted stock units, employee stock purchase plan, and other 0.6 0.5
Additional capital from share-based compensation 10.6 9.8
Repurchases of 0.1 and 1.1 common shares (7.6) (50.0)
Reclassification to temporary equity (11.3)  
Issuance of convertible senior notes   136.5
Repurchase of convertible senior notes   (123.0)
Unwind of capped call transactions   44.0
Net income 96.3 82.1
Foreign currency translation adjustment, net of income taxes of $0.5 and $1.1 7.1 21.2
Unrealized loss on derivatives, net of income taxes of $— (1.4) (3.1)
Cumulative effect of accounting change   (2.3)
Ending balance (629.1) (219.0)
Common Shares [Member]    
Beginning balance 0.1 0.1
Ending balance 0.1 0.1
Treasury Stock [Member]    
Beginning balance (328.9) (328.6)
Repurchases of 0.1 and 1.1 common shares   (0.3)
Ending balance (328.9) (328.9)
Paid-in Capital in Excess of par Value [Member]    
Beginning balance 341.5 407.3
Issuance of 0.4 and 2.7 common shares from exercise of stock options, SARs, restricted stock units, employee stock purchase plan, and other 0.6 0.5
Additional capital from share-based compensation 10.6 9.8
Repurchases of 0.1 and 1.1 common shares (7.6) (49.7)
Reclassification to temporary equity (11.3)  
Issuance of convertible senior notes   136.5
Repurchase of convertible senior notes   (123.0)
Unwind of capped call transactions   44.0
Ending balance 333.8 425.4
Accumulated Other Comprehensive Loss [Member]    
Beginning balance (209.8) (165.4)
Foreign currency translation adjustment, net of income taxes of $0.5 and $1.1 7.1 21.2
Unrealized loss on derivatives, net of income taxes of $— (1.4) (3.1)
Ending balance (204.1) (147.3)
Accumulated Deficit [Member]    
Beginning balance (526.3) (248.1)
Net income 96.3 82.1
Cumulative effect of accounting change   (2.3)
Ending balance $ (430.0) $ (168.3)